"Blaine is that guy right now," Harbaugh said Friday of the No. 2 quarterback, per The Sacramento Bee's Matt Barrows.
In two preseason games, Gabbert is a combined 11-of-25 passing for 60 yards (2.4 yards per pass) with two interceptions, a 17.9 passer rating and -- like every 49ers QB -- a goose egg in the touchdown column.
"I don't judge it off just those," Harbaugh said of the bleak statistics. "I've been pretty clear what I thought we needed to get better as, as a unit. Team-oriented offense that has precision and plays well together, all 11, and that's what we're going to be striving for."
Harbaugh told reporters he would not look outside the organization for a backup quarterback.
"We've had a good week," he said. "Feel like we made progress. Hopefully, that progress shows up on Sunday."
Last week he spoke similarly optimistic about Gabbert, who then proceeded to raise his per attempt average by a whopping 1.1 yards.
For a team built to win now, like the 49ers, to chance a ruined season based on one injury isn't comforting.